Improvement in draft-regulators



t1. BAKER; DRAFT REGULATOR.

Patnte'd May1, 1877.-

mvzmn 1 moaum witnesses:

N-FETERS, PHUTO-UTNOGRAPHER. WASHINGTON. D. G.

UNITED STATES PATENT DFFIO'E.

THOMAS BAKER, OF ALBANY, NEW YORK.

IMPROVEMENT I N DRAFT-REGULATORS.

Specification forming part of Letters Patent No. 190,181, dated May 1,1877; application filed April 2, 1877. I

To all whom itmay concern:

Be it known that I, THOMAS BAKER, of Albany, in the county of Albany andState of New York, have invented a new and useful Improvement inDraft-Regulator, of which the following is a specification:

. Figure l is a side view of my improved device, the flue, damper, anddamper-case being shown in section. Fig. 2 is a rear view of the same.Fig. 3 is a front view of the same.

Similar letters of reference indicate corresponding parts.

The object of this invention is to furnish an improved apparatus whichshall be so constructed as to enable the fireman to control his fire, sothat the heat, after the fire is fully burning, may be prevented frompassing off with the products of combustion to so great an extent as itotherwise would, and which shall be simple in construction andconvenient in use.

The invention consists in the combination of the open-bottomed case, thedamper, bar, and chain, the weight and chain, the pulleys and shaft, andthe chain, guard, and point, with each other and with the flue of afurnace,

as hereinafter fully described.

A represents a boiler and furnace, and B represents the flue throughwhich the smoke and other products of combustion pass to the chimney. Tothe lower side of the fine 13 is attached a case, 0, to receive thedamper D, and which is made with an open bottom, so that the soot andashes that may enter it will drop out, and cannot accumulate andobstruct the movement ofthe said damper. The damper D moves up and downthrough a transverse chain, H, a counterpoiseweight, I, to partiallybalance the damper D, but is not heavy enough to prevent the saiddamper, when released,'

from descending by its own weight. The wheel or pulley G is attached toa shaft, J, which revolves in bearings K, attached to the upper side ofthe flue B. To one end of the shaft J is attached a wheel or pulley, L,aroundlwhich passes, and to which is attached, a chain, M, which passesthrough a tubular guard or shield, N, secured to the side of the furnaceA, or to other suitable supports, and which terminates at the front ofthe furnace. The end of the chain 1V1 projects from the forward end ofthe guard N, and has a handle attached to it.

By this construction, by pulling upon the chain M, the damper D can beraised to any desired extent, and can be secured in place,

when adjusted, by passing a link of the said chain M over a pin, 0,attached to the forward end of the guard N. By counting the links of thechain M drawn from the forward end of the guard N the fireman can adjustthe damper D in any desired position without leaving the front of thefurnace.

P is a steam-gage, attached to the front of the boiler, so that thefireman can always see what the steam-pressure is, and can regulate thedamper as required.

Having thus described my invention, I claim as new and desire to secureby Letters Patent-- The combination of the open-bottomed case (J, thedamper, bar, and chain, D- E F, the weight and chain I H, the pulleysand shaft G L J, and the chain, guard, and pin M N O, with each otherand with the flue B of a furnace, A, substantially as herein shown anddescribed.

- THOMAS BAKER. Witnesses:

WM. J. LA BARTE, MARTIN CAIN.

